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  <title>Document</title>
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<body>
  <script>
    var hasAllCodes = function (s, k) {
      let num, sear;
      for (let i = 0; i <= Math.pow(2, k) - 1; i++) {
        num = i.toString(2);
        sear = "0".repeat(k - num.length) + num;
        if (s.indexOf(sear) == -1)
          return false;
      }
      return true;

    };
    console.log(hasAllCodes("0110", 1));
  </script>
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